68 Dhr fiords Afnniaf Report. 



axillae of pedlorals black. Fins whitish, except a dusky blotch on 

 tip of soft dorsal. Three specimens. Length 2-7 inches. Agaiia, 

 Guam, June 14, 1900. Hab. Red Sea, east coast of Africa, Seas 

 of India to Malay Archipelago, Marianas, Hawaiian Islands. 



Genus HOI^OCBNTRUS (Gronow) Scopoli. 



69. Holocentrus diadetna Lacep. 



Head 3.20; depth 3; eye 2.50; interorbital equal to snout, 4.20 

 into head. Maxillary 3 into head and reaching to a line beneath 

 the anterior margin of pupil. The upper processes of intermax- 

 illaries end scarcely posterior of anterior margin of eye. . D. xi 13; 

 A. IV 9; P. 15; V. I 7. Scales 3-48-8; a single vertical row of 9 scales 

 on the opercle. Orbital, opercular and preopercular bones serrated. 

 The preorbitals have a large spine anteriorly; two opercular spines, 

 the upper of which is much the stronger. The preopercular spine is 

 2.66 into vertical margin of preopercle and 2 into eye. Fins: Caudal 

 well forked ; the third, fourth and fifth dorsal spines the longest, 

 about equal to longest ray of soft dorsal; third spine of anal much 

 the longest, 1.20 into head, about equal in length to ventral fin. 

 The scales on the sides of anal fin are much elongated and serrated. 

 Color in life: Red, with lighter longitudinal lines. Color in spirits: 

 Silvery grayish, darker above, with about 10 lighter longitudinal 

 lines. Dorsal fin black, with a white longitudinal line through the 

 middle, also an indication of light coloring on margin of fin. The 

 web between third and fourth anal spine is black, otherwise all 

 the fins are uniform yellowish white. Three specimens. Length 

 2.50-5.50 inches. Guam, July 28, 1900. Hab. Red Sea, Ceylon, 

 Chinese Sea, Indian Archipelago, Marianas. 



70. Holocentrus operculare Cuv. & Val. 



Young: Head 3.20; depth 3; eye 2.50; maxillary equal to eye; 

 interorbital 3.50 into head; D. xi 13; A. iv 10. Scales 37. Opercles 

 and preopercles serrated, the preopercle spine equal to diameter of 

 eye, and much smaller than the two spines of the opercles. Color, 

 red; in spirits, a silvery grayish, slightly darker above. All the fins 

 yellowish white, except the spinous dorsal w^hich is black with 

 white lines between the spines. One specimen, very young. 

 Length 2 inches. Guam, July 23, 1900. Hab. Sea of New Ireland, 

 Banda, Marianas. 



71. Holocentrus binolatum Quoy & Gaim. Cholog. 



Head 3 ; depth 2.66 ; eye 2.50 ; snout about equal to inter- 

 orbital; D. XI 14; A. IV 9; P. 14; V. I 7. Scales 4-46-8. Opercles, 

 preopercles, and orbitals with posterior and lower margins serrated. 

 Maxillary reaching the posterior margin of pupil 2.20 into head. 

 Mandible i .66 into head. Preopercular spine long and strong, about 



